Planodraph co



M. OLSON.

CU TTER- HEAD. APPLICATION FILED OCT- 14. 1918.

1,308,297. V Patented July 1, 1919.

2 SHEETS SHEET I.

THE COLUMBIA PLANOORAPH (20., WASHINGTON, D. C.

I Ma OLSON;

cumR HEAD. APPLICATION FILED OCT. 14. I918.

' Patented July 1, 1919.

[ET H T llu/ 51 m: M- EJ151311- head. i

UNITED .sT Tns PATENT. onnron.

MAenus Orson;oreonnnnrmrisn oonUMBrA; CANADA; p

cuiri' nn rrnnnl Application filed 0ctober 14, 1913. Serial N0.258;067.

To all whom it may concern.-

Be it known thatl, MLAoNUs sub- More specifically, thewinvention coinjpre} hends the provisionof a rotary cutter head as specified including av plurality of blade carrying blocks, Whichare l1QlClJO0-l1nBGt9d to the body of the he'ad lbyj suitable wedge blocks and interlocking ribvand recess structures, and an adj ustable' knife block ad ust ing member which may be rnoved, for ary-- ingthe angle of theuouter surfaces ofthe knife carrying block, and consequently y of the knives, for regulating; the bevel-l oft the surface being out.) it i Other objects of the. invention will appear in the following detailed description, taken in connection Withthe accompanying;drawings, forming-a part of this specification, and in which drawings: s Figure 1 is, a side welev'ation of theiyimiproved cutter head; a Fig.:.2 is anend elevationof theiicutter Fig. 3 isa longitudinal secti the cutter head, Ltaken. o1rthe"-line 3 3 of Fig.2. .1 a

Fig. 4 is a detail perspectivehview "of the knife block adjusting :niem-ber and M Fig- 5is'a detail perspective vievvof one ofthe Wedge blocks used in construction of the cutterhead. f i 1 y r Referring Inoreparticularly to the drawings, 1 indicates the: shaft which carries the cutter head. The cutter head properucorn prises the main body s2,iwhi"ch is circular in shape and has i a longitudinally extehdlng sleeve '3.for1ned integrally therewith which sleeve iskeyed by keys t to the shaft 1. The

main body 2 of thecutter head islprovided with a plurality of J diainetrlcally opposed substantially rectangular openlngs 5 which on through lreceivetherein the cutter or knife carrying blo cksfii The" blocks Gare provided with laterally eXtendingrecesses 7 in their 'loWer jouterjlcorners the edges of which recesses 'are disposed at obtuse angles to'each other, ,the sides beingada-pted to fit snugly against the inner-inclined sides 9 of ribs 10 NVlllOll extend across the outer end. of the recesses 5,

for connecting the blocks 6 to the main body 2 of the head to permit the blocks to be ,swung outwardly upon the inner edges of, theribs 9 as a pivot, and as indicated in dotted lines in Fig. 3 of the drawings, for .regulatingith'e angle of the outer surface of i the blocks and consequently regulating; the

bevelg of the surface being, cut by the cutter .head.,. l

yTheblocks 6 are held properly within the recesses 5 by, wedge bloc is 11 the outer surfaces of which areshaped to conform to the ,currature of the circumference of nerlphery ofthe; main body 2. Thewedge blocks 11 have C threaded shanks 12 formed thereupon upon which are mounted nuts=13. These nuts engage the outer surfaces of lugs 14- formed upon the outer surface of the body 2 for holding the wedges in adjusted positions and for drawing them inwardly into the portions of! the recesses 5 upon one side of each ofthe blocks 6 for securely Wedging the blocks in; the recesses andiholding the blocks against longitudinal movement. a

. Thesknifeiblocks 6 are providedwith angularl y disposed recesses 15 which are adapted to reee vethe cu tt'ers'or knlves, (not shewn) i and these recesses 15 have one of their sides inclinedas elearly shewnin Fig.

1 of; the drawings forreceiving therein the knife Wedging blocks-16. Tl'1eknifewedging blocks 16 have flat knife engaging surfaces-7 and their backs areprovided With longitudinally extending ribs 181 which reinforce theblockstructures and merge into the threade'dshank 19 formed upon the ends of the: wedgingunembers or block 16. Nuts 20 are mounted upon the shank 19 and engage againstthelrear or inner ends of the headsti for drawing thebloeks: 16 into the recesses 15 to securely clamp a cutter ori knife in each of the recesses.

The sleeve 3 which ismforlned upon the main body 2 of the cutter head is provided with i an angular channel 21 which receives therein: set or lockscrews 22. The set or lock screwsQQextend through the threaded sleeve 23, connecting this sleeve against longitudinal movement upon the sleeve 3. The outer th'readed surface of the sleeve 23 engages in the threaded bore 24 of the knife carrying block adjusting head 25. The head 25 comprises a disk like body 26 having a plurality of substantially triangular shaped lugs 27 formed thereon at spaced intervals. The altitude or inclined sides of these substantially right angularly triangled lugs 27 'is positioned outwardly and their apexes are adapted for engagement between the rounded inner lower edges 28 of the knife carrying blocks 6 so that when the adjusting member 25 is moved along the threaded sleeve 23, in the direction indicated by the arrow A in Fig. 3 of the drawings, the lugs will be wedged or forced beneath the blocks 6 rocking the blocks upon engagement between the blocks and the ribs 10, causing the blocks to be projected at various angles to the longitudinal axis of the cutter head for cutting surfaces of various beveled angles on the article being worked upon. Thus by moving the head 25 longitudinally along the threaded sleeve 23, the blocks 6 may be forced outwardly at greater angles to the axis of the head or allowed to move inwardly for decreasing the angle of the knife carried by the blocks with respect to the axis of rotation of the head and if the lugs 27 are withdrawn completely from beneath the inner flat surfaces of the blocks 6, a square surface may be cut on the artlcle being worked upon.

Changes in detail may be made without departing from the spirit of this invention, but; I

I claim:

1. In a rotary cutter head, the combination, of a body provided with a plurality of circumferentially spaced recesses, a plurality of knife carrying blocks pivotally seated in said recesses, means for adjusting the longitudinal angle of said block, comprising substantially triangularly shaped lugs for engagement with the inner surface of the block and for facial engagement with the inner wall of the recess to provide a firm support for the blocks.

2. In a rotary cutter head, the combination, ofa body provided with a plurality of circumferentially spaced recesses, a plurality of knife carrying blocks pivotally seated in said recesses, a sleeve formed upon said body, a threaded sleeve carried by said first sleeve, a head adjustably carried by said threaded sleeve, substantially triangularly shaped lugs carried by'said head for engagement with the inner surfaces of the blocks and for facial engagement with the inner walls of the recess to provide a firm support for the block.

3. In a rotary cutter head, thecombination, of a main body provided with a plurality of recesses extendinginwardly from the periphery of the body, ribs formed upon said body and presenting inclined surfaces into said recesses, knife carrying blocks positioned in said recesses and having their inner forward corners cut away to fit said ribs and permit limited pivotal movement of the block with respect to said head.

4. In a rotary cutter head, the combination of a main body provided with a plurality of recesses extending inwardly from the periphery of the body, ribs formed upon said body and presenting inclined surfaces into said recesses, knife carrying blocks positioned in said recesses and having their inner forward corners cut away to fit said ribs and permit limited pivotal movement of the block with respect to said head, and means adjustably carried by said body and adapted to engage beneath the blocks at their ends opposite said out out portion to vary the angle of the outer surfaces of the block with respect to the axis of rotation of the cutter head.

5. In a rotary cutter head, the combination, of a main body provided with a plurality of recesses extending inwardly from the periphery of the body, ribs formed upon said body and presenting inclined surfaces into said recesses, knife carrying blocks positioned in said recesses, and having their inner forward corners cut awav to fit said ribs and permit limited pivotal movement of the block with respect to said head, means adjustably carried by said body and adapted to engage beneath the blocks at their ends opposite said out out portion to vary the angle of the outer surfaces of the block with respect to the axis of rotation of the cutter head, wedge members positioned in said recesses and engaging one upon each side of one of said blocks, threaded shanks formed upon said wedge member, nuts mounted upon said threaded shank and adapted for engagement with main body to force said wedge member against the adjacent side of said knife carrying blocks.

6. In a rotary cutter head, the combinatlon, of a main body provided with a plurality of recesses extending inwardly from the periphery thereof, a plurality of knife carrying blocks mounted in said recesses and adapted for pivotal movement with respect to the main body, a threaded sleeve formed upon said main body, a head adjustably carried by said sleeve, lugs formed upon said disk and adapted to engage beneath said knife carrying blocks to pivotally move the blocks to vary the angle of the outer surfaces of the blocks with respect to the axis of rotation of the head.

7 In a rotary cutter head, the combination, of a main supporting body provided with a plurality of recesses extending inwardly from the periphery thereof, knife carrying blocks mounted in said recesses,

means for preventing longitudinal move ment of said blocks within said recesses, a sleeve formed upon said main body, an adjusting head carried by said sleeve, a plurality of lugs carried by said adjusting head and adapted to engage beneathsaid knife carrying blocks to move the blocks in said recesses to vary the angle of the outer surfaces of the blocks with respect to the axis of rotation of the head.

8. In a rotary cutter head, the combination, of a main body, provided with a plurality of recesses extending inwardly from the periphery of the body, ribs extending across the outer ends of said body and having their inner edges beveled, knife carry ing blocks mounted in said recesses and having their outer lower corners cut away to receive said ribs and permit limited pivotal movement of the blocks with respect to the body, a sleeve formed upon said body, an adjusting head adjustably carried by said sleeve, substantially triangularly shaped lugs formed upon said adjusting head and adapted to engage beneath the inner surfaces of said knife carrying blocks to pivotally move the bloekwithin said recesses.

9. Ina rotary cutter head, the combination, of a main body, provided with a plurality of recesses extending inwardly from the periphery of the body. ribs extending across the outer ends of said bodv and having their inner edges beveled, knife carrying blocks mounted in said recesses, and having their outer lower corners cut away to receive said ribs and permit limited pivotal ing blocks, and means for forcing said wedge members into engagement with the ad acent sides of the knife carrvln block.

MAGNUS OLSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

